CN204718653U - A kind of distributed stream gauge - Google Patents
A kind of distributed stream gauge Download PDFInfo
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- CN204718653U CN204718653U CN201520416280.4U CN201520416280U CN204718653U CN 204718653 U CN204718653 U CN 204718653U CN 201520416280 U CN201520416280 U CN 201520416280U CN 204718653 U CN204718653 U CN 204718653U
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- plectane
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Abstract
The utility model discloses a kind of distributed stream gauge, comprise pipeline, the two ends of pipeline are connected with pipe flange, pipeline is connected with short tube a and short tube b, short tube a and short tube b is connected to pressure measuring valve a and pressure measuring valve b, pressure measuring valve a is connected with differential pressure transmitter with pipeline b respectively by pipeline a with pressure measuring valve b, is connected with equalizing valve between pipeline a and pipeline b; Affixed throttling plectane in pipeline, throttling plectane is evenly provided with several edge through holes, and throttling plectane circle centre position is provided with through hole a, and throttling plectane is connected with fairing.A kind of distributed stream gauge is by arranging fairing, and the fluid in pipeline, through fairing, makes the fluid egress point velocity gradient in pipeline reduce, and pressure distribution is more even, makes pressure more stable, is conducive to improving flowmeter accuracy.Flow field is conducive to improving efflux coefficient through the optimization of distributed rectification and entrance shape, and strength of vortex reduces simultaneously, and permanent compression loss is reduced.
Description
Technical field
The utility model belongs to flowmeter technology field, relates to a kind of distributed stream gauge.
Background technology
Differential pressure flowmeter is a kind of instrument being measured flow by differential pressure.There is the principle of certain relation between the pressure differential that it produces when being and utilizing fluid to flow through fairing and flow, realizing flow measurement by measuring differential pressure.Fairing is the local contraction element installed in the duct, the most frequently used abacus, nozzle and Venturi tube.The straight length of multi-hole orifice is partially long on the market, and during mensuration flow, permanent crushing is high, and efflux coefficient is low is about 0.6.
Utility model content
The purpose of this utility model there are provided a kind of distributed stream gauge, can improve efflux coefficient, reduces permanent compression loss.
The technical scheme that the utility model adopts is: a kind of distributed stream gauge, comprise pipeline, the two ends of pipeline are connected with pipe flange, pipeline is connected with short tube a and short tube b, short tube a and short tube b is connected to pressure measuring valve a and pressure measuring valve b, pressure measuring valve a is connected with pressure difference transmitter with pipeline b respectively by pipeline a with pressure measuring valve b, is connected with equalizing valve between pipeline a and pipeline b;
Affixed throttling plectane in pipeline, throttling plectane is evenly provided with several edge through holes, and throttling plectane circle centre position is provided with through hole a, and throttling plectane is connected with fairing.
Feature of the present utility model is also,
The two ends of edge through hole are provided with chamfering or rounding.
Fairing comprises frustum of a cone a, the bigger diameter end of frustum of a cone a is connected with the side of throttling plectane, is provided with through hole b in frustum of a cone a, and the miner diameter end diameter of frustum of a cone a is identical with through hole b diameter, through hole b is identical with through hole a diameter, and the center of circle of through hole b and through hole a is located along the same line.
Through hole b and the non-link of through hole a are provided with chamfering or rounding.
Fairing comprises frustum of a cone b, the bigger diameter end of frustum of a cone b is connected with the opposite side of throttling plectane, is provided with taper hole in frustum of a cone b, and the miner diameter end of taper hole is identical with through hole a diameter, the center of circle of taper hole and through hole a is located along the same line, and the bigger diameter end diameter of taper hole is identical with the large footpath diameter of frustum of a cone b.
Through hole b and the non-link of taper hole are provided with chamfering or rounding.
Fairing comprises cone a and cone b, and cone a is all connected with throttling plectane with the bottom of cone b, and throttling plectane, cone a and cone b are coaxial, and cone a and cone b are positioned at the relative both sides of throttling plectane.
The coning angle of cone a is 30 ° ~ 90 °, and the coning angle of cone b is 60 ° ~ 150 °.
Fairing comprises cone c, frustum of a cone c and cone d, throttling plectane, cone c, frustum of a cone c and cone d are coaxial, the bigger diameter end of frustum of a cone c is all connected with throttling plectane with the bottom of cone d, frustum of a cone c and cone d are positioned at the relative both sides of throttling plectane, the bigger diameter end of frustum of a cone c is identical with cone d bottom surface diameter of a circle, the miner diameter end of frustum of a cone c is identical with cone c bottom surface diameter of a circle, and the miner diameter end of frustum of a cone c is connected with cone c bottom surface circle.
Edge hole is circular hole or scallop hole.
The beneficial effects of the utility model are:
1) a kind of distributed stream gauge is by arranging fairing and throttling plectane, fluid in pipeline is through fairing and throttling plectane, and the fluid egress point velocity gradient in pipeline is reduced, and pressure distribution is more even, make pressure more stable, be conducive to improving flowmeter accuracy.Flow field is conducive to improving efflux coefficient through the optimization of distributed rectification and entrance shape.Because the fluid velocity pressure gradient in pipeline reduces, strength of vortex reduces simultaneously, and pressure is more stable, can improve range ratio, and because the fluid velocity pressure gradient in pipeline reduces, strength of vortex reduces simultaneously, and permanent compression loss is reduced.
2) pressure measuring valve a, pressure measuring valve b and equalizing valve, forms external three valve groups, completes the needs of pressure, differential pressure transmitter zeroing, decreases fault and leak point, to decrease in measurement due to the additive error that three valve groups are brought, improve and measure pipeline reliability.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of distributed stream gauge of the utility model;
Fig. 2 is the structural representation of fairing embodiment one in a kind of distributed stream gauge of the utility model;
Fig. 3 is the structural representation of fairing embodiment two in a kind of distributed stream gauge of the utility model;
Fig. 4 is the structural representation of fairing embodiment three in a kind of distributed stream gauge of the utility model;
Fig. 5 is the structural representation of fairing embodiment four in a kind of distributed stream gauge of the utility model;
Fig. 6 is the structural representation of throttling plectane embodiment one in a kind of distributed stream gauge of the utility model;
Fig. 7 is the structural representation of throttling plectane embodiment two in a kind of distributed stream gauge of the utility model.
In figure: 1. cone b, 2. fairing, 3. pipeline, 4. short tube a, 5. pressure measuring valve a, 6. equalizing valve, 7. differential pressure transmitter, 8. pipe flange, 9. throttling plectane, 10. short tube b, 11. pressure measuring valve b, 12. pipeline a, 13. pipeline b, 14. edge through holes, 15. through hole a, 16. frustum of a cone a, 17. through hole b, 18. frustum of a cone b, 19. taper holes, 20. cone a, 21. cone c, 22. frustum of a cone c, 23. cone d.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The utility model provides a kind of distributed stream gauge, as shown in Figure 1, comprise pipeline 3, the two ends of pipeline 3 are connected with pipe flange 8, pipeline 3 is connected with short tube a4 and short tube b10, short tube a4 and short tube b10 is connected to pressure measuring valve a5 and pressure measuring valve b11, pressure measuring valve a5 is connected with pressure difference transmitter 7 with pipeline b13 respectively by pipeline a12 with pressure measuring valve b11, is connected with equalizing valve 6 between pipeline a12 and pipeline b13;
Affixed throttling plectane 9 in pipeline 3, throttling plectane 9 is evenly provided with several edge through holes 14, and throttling plectane 9 circle centre position is provided with through hole a15, throttling plectane 9 is connected with fairing 2.
The two ends of edge through hole 14 are provided with chamfering or rounding.
As shown in Figure 2, fairing 2 comprises frustum of a cone a16, the bigger diameter end of frustum of a cone a16 is connected with the side of throttling plectane 9, through hole b17 is provided with in frustum of a cone a16, the miner diameter end diameter of frustum of a cone a16 is identical with through hole b17 diameter, through hole b17 is identical with through hole a15 diameter, and the center of circle of through hole b17 and through hole a15 is located along the same line.
Through hole b17 and the non-link of through hole a15 are provided with chamfering or rounding.
As shown in Figure 3, fairing 2 comprises frustum of a cone b18, the bigger diameter end of frustum of a cone b18 is connected with the opposite side of throttling plectane 9, taper hole 19 is provided with in frustum of a cone b18, the miner diameter end of taper hole 19 is identical with through hole a15 diameter, taper hole 19 is located along the same line with the center of circle of through hole a15, and the bigger diameter end diameter of taper hole 19 is identical with the large footpath diameter of frustum of a cone b18.
Through hole b17 and taper hole 19 are provided with chamfering or rounding.
As shown in Figure 4, fairing 2 comprises cone a20 and cone b1, cone a20 is all connected with throttling plectane 9 with the bottom of cone b1, and throttling plectane 9, cone a20 and cone b are coaxial, and cone a20 and cone b1 are positioned at the relative both sides of throttling plectane 9.The coning angle of cone a20 is 30 ° ~ 90 °, and the coning angle of cone b1 is 60 ° ~ 150 °.
As shown in Figure 5, fairing 2 comprises cone c21, frustum of a cone c22 and cone d23, throttling plectane 9, cone c21, frustum of a cone c22 and cone d23 are coaxial, the bigger diameter end of frustum of a cone c22 is all connected with throttling plectane 9 with the bottom of cone d23, frustum of a cone c22 and cone d23 are positioned at the relative both sides of throttling plectane 9, the bigger diameter end of frustum of a cone c22 is identical with cone d23 bottom surface diameter of a circle, the miner diameter end of frustum of a cone c22 is identical with cone c21 bottom surface diameter of a circle, and the miner diameter end of frustum of a cone c22 is connected with cone c21 bottom surface circle.
As shown in Figure 6 and Figure 7, edge hole 14 is circular hole or scallop hole.
Throttling plectane 9 is played a supporting role, and fairing 2 plays the effect of rectification, throttling.
The principle of work of a kind of distributed stream gauge of the utility model is: be connected on tested pipeline by pipe flange 8 by the utility model, or pass through folder, the utility model is connected on tested pipeline by welded and installed mode, fluid in pipeline flows through fairing 2, fluid in pipeline is rectified device 2 to be stopped and forces shunting, pipeline center's high-velocity fluid is successively by through hole b17 and through hole a15, or successively by taper hole 19, through hole b17 and through hole a15, or center high-velocity fluid distributes several edge through holes 14 on throttling plectane 9 in pipeline by cone a20 or cone c21, fluid in pipeline outside fairing 2 continues flowing, slow compression, and by several edge through holes 14, further rectification, thus optimize and revise the flow curve of fluids within pipes.
Fairing 2 and throttling plectane 9, flow state rectification irregular in pipeline, inside and outside fluid distrbution, slowly compress, reduce whirlpool, rotating flow, make pressure x velocity, be more evenly distributed;
Fluid flows through fairing 2 and throttling plectane 9, and front and back produce differential pressure.Differential pressure is drawn by short tube a4 and short tube b10, and directly enters differential pressure transmitter 7 through pressure measuring valve a5 and pressure measuring valve b11 and carry out differential pressure measurement.
Between pipeline a12 and pipeline b13, be connected with equalizing valve 6, equalizing valve 6 is for the protection of differential pressure transmitter 7 and differential pressure transmitter 7 adjustment zero point.
A kind of distributed stream gauge is by arranging fairing 2 and throttling plectane 9, fluid in pipeline is through fairing 2 and throttling plectane 9, and the fluid egress point velocity gradient in pipeline is reduced, and pressure distribution is more even, make pressure more stable, be conducive to improving flowmeter accuracy.Flow field is conducive to improving efflux coefficient through the optimization of distributed rectification and entrance shape.Because the fluid velocity pressure gradient in pipeline reduces, strength of vortex reduces simultaneously, and pressure is more stable, can improve range ratio, and because the fluid velocity pressure gradient in pipeline reduces, strength of vortex reduces simultaneously, and permanent compression loss is reduced;
Pressure measuring valve a5, pressure measuring valve b11 and equalizing valve 6, form external three valve groups, complete the needs of pressure and zeroing, decrease fault and leak point, to decrease in measurement due to the additive error that three valve groups are brought, and improves and measure pipeline reliability.
Claims (10)
1. a distributed stream gauge, it is characterized in that: comprise pipeline (3), the two ends of pipeline (3) are connected with pipe flange (8), pipeline (3) is connected with short tube a (4) and short tube b (10), short tube a (4) and short tube b (10) is connected to pressure measuring valve a (5) and pressure measuring valve b (11), pressure measuring valve a (5) is connected with pressure difference transmitter (7) with pipeline b (13) respectively by pipeline a (12) with pressure measuring valve b (11), equalizing valve (6) is connected with between pipeline a (12) and pipeline b (13),
Affixed throttling plectane (9) in described pipeline (3), throttling plectane (9) is evenly provided with several edge through holes (14), throttling plectane (9) circle centre position is provided with through hole a (15), throttling plectane (9) is connected with fairing (2).
2. a kind of distributed stream gauge according to claim 1, is characterized in that: the two ends at described edge through hole (14) are provided with chamfering or rounding.
3. a kind of distributed stream gauge according to claim 1, it is characterized in that: described fairing (2) comprises frustum of a cone a (16), the bigger diameter end of frustum of a cone a (16) is connected with the side of throttling plectane (9), through hole b (17) is provided with in frustum of a cone a (16), the miner diameter end diameter of frustum of a cone a (16) is identical with through hole b (17) diameter, through hole b (17) is identical with through hole a (15) diameter, and through hole b (17) is located along the same line with the center of circle of through hole a (15).
4. a kind of distributed stream gauge according to claim 3, is characterized in that: described through hole b (17) and through hole a (15) non-link are provided with chamfering or rounding.
5. a kind of distributed stream gauge according to claim 4, it is characterized in that: described fairing (2) comprises frustum of a cone b (18), the bigger diameter end of frustum of a cone b (18) is connected with the opposite side of throttling plectane (9), taper hole (19) is provided with in frustum of a cone b (18), the miner diameter end of taper hole (19) is identical with through hole a (15) diameter, taper hole (19) is located along the same line with the center of circle of through hole a (15), and the bigger diameter end diameter of taper hole (19) is identical with the large footpath diameter of frustum of a cone b (18).
6. a kind of distributed stream gauge according to claim 5, is characterized in that: described through hole b (17) and taper hole (19) non-link are provided with chamfering or rounding.
7. a kind of distributed stream gauge according to claim 1, it is characterized in that: described fairing (2) comprises cone a (20) and cone b (1), cone a (20) is all connected with throttling plectane (9) with the bottom of cone b (1), throttling plectane (9), cone a (20) and cone b are coaxial, and cone a (20) and cone b (1) are positioned at the relative both sides of throttling plectane (9).
8. a kind of distributed stream gauge according to claim 7, is characterized in that: the coning angle of described cone a (20) is 30 ° ~ 90 °, and the coning angle of cone b (1) is 60 ° ~ 150 °.
9. a kind of distributed stream gauge according to claim 1, it is characterized in that: described fairing (2) comprises cone c (21), frustum of a cone c (22) and cone d (23), throttling plectane (9), cone c (21), frustum of a cone c (22) and cone d (23) is coaxial, the bigger diameter end of frustum of a cone c (22) is all connected with throttling plectane (9) with the bottom of cone d (23), frustum of a cone c (22) and cone d (23) are positioned at the relative both sides of throttling plectane (9), the bigger diameter end of frustum of a cone c (22) is identical with cone d (23) bottom surface diameter of a circle, the miner diameter end of frustum of a cone c (22) is identical with cone c (21) bottom surface diameter of a circle, the miner diameter end of frustum of a cone c (22) is connected with cone c (21) bottom surface circle.
10. a kind of distributed stream gauge according to claim 1, is characterized in that: described edge through hole (14) is circular hole or scallop hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520416280.4U CN204718653U (en) | 2015-06-17 | 2015-06-17 | A kind of distributed stream gauge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520416280.4U CN204718653U (en) | 2015-06-17 | 2015-06-17 | A kind of distributed stream gauge |
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| CN204718653U true CN204718653U (en) | 2015-10-21 |
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| CN201520416280.4U Active CN204718653U (en) | 2015-06-17 | 2015-06-17 | A kind of distributed stream gauge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225460A (en) * | 2017-12-29 | 2018-06-29 | 嘉兴乾昆工业设计有限公司 | A kind of intellectual water meter that can check the number of degrees immediately |
| CN109813380A (en) * | 2019-03-22 | 2019-05-28 | 江苏华海测控技术有限公司 | A kind of wedge flow sensor with balanced structure |
-
2015
- 2015-06-17 CN CN201520416280.4U patent/CN204718653U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108225460A (en) * | 2017-12-29 | 2018-06-29 | 嘉兴乾昆工业设计有限公司 | A kind of intellectual water meter that can check the number of degrees immediately |
| CN109813380A (en) * | 2019-03-22 | 2019-05-28 | 江苏华海测控技术有限公司 | A kind of wedge flow sensor with balanced structure |
| CN109813380B (en) * | 2019-03-22 | 2023-09-22 | 江苏华海测控技术有限公司 | Wedge-shaped flow sensor with balance structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |